{
  "manageEntity": {
    "action": "Save",
    "entityId": "1530627932",
    "entityType": "Track",
    "nonce": "0xe7629b22611ce1516e8d805532383196afc5ee36a246668e2d0c83d1fbea51c4",
    "signature": "0xed3d5feed87a9a0691f50d81df969837b44cdd07874b0dc6e2bdc85c9250730175570d66741819b5cbaa65c6d9c55f5491eb3a5cdc33f8795c9cf0b401cf0f041c",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "301637"
  }
}